AMERICAN HYMENOPTERA. 43 



Bider this an error, until such specimens are taken in Georgia or else- 

 where. 



The larvae are known to feed on the elm, the willow and the linden. 

 They get their full growth about the middle of August, when they are 

 from one and a half to two inches in length. Skin rough, transversely 

 wrinkled ; color pale grayish-yellow, with a stripe of two slender black 

 lines along the back, from head to tail. Spiracles black. When at 

 rest they hold to the leaf with the fore feet, and twist the body inward 

 sidewise into a spiral position. 



2. C. Klugii, Leach Zool. Misc., No. 6. Lepel, Mon. Tenth. 30, 85, 9 .—St. 



Domingo. 



3. C. McLeayi, Leach, Zool. Misc., No. 2. Lepel, Mon. Tenth. 30, 82, '^— St. 



Domingo. 



4. C. venusta, Perty, Delect. Anim. Art. 1. 1830, 129, Tab. xxvi, fig. 1.— Brazil. 



Genus 2. TKICHIOSOMA, Leach. 

 Trichiosoma, Leach, Zool. Misc. 

 Cimbe.v, Fabr. and authors. 

 Wings as in Cimhcx. 



Antennae, 8-articulate ; 3d article nearly half the length of antennaj, 

 very slender; club 3-articulate, the two last closely soldered. 



Head of % as wide as thorax, of $ not as wide as thorax, nasus re- 

 tracted, labrum orbicular; mandibles generally bidentate. 



Body densely pilose. Abdomen much like Cimhex^ notch in first 

 segment not so deep. 



Legs stout; the four posterior femora of males thickened, deeply 

 channeled and dentate ; tibioe with two obtuse spurs. ' 



Larvse and metamorphoses as in Chnhex. 



]. T. triangulum. 



Trichiosoma triangulum, Kirby, Faun. Bor. Am. iv, 1837, 254. 

 Trichiosoma lucorum, Kirby, Faun. Bor. Am. iv, 1837, 255. 

 Trichiosoma bicolor, Harris, MSS., Norton, Proc. Bost. Soc. viii, 150, %. 

 "Black, hairy, with cinereous lanuginous hairs; fourth, fifth and sixth ar- 

 ticles of antennae, wings, tibise and tarsi, testaceous, thighs black-blue; abdo- 

 men ferruginous, with a dorsal black isosceles triangle." Length 0.60 — 0.68. 

 Br. wings 1.32—1.56 inch. 



% 9 . Body black, shining, more or less punctured, covered with 

 soft and woolly whitish hairs. 



Head, excluding the mandibles, depressed, orbicular, as wide as the 

 trunk, (that of female much narrower); mandibles crossed, very sharp, 

 black, polished, distinctly bidentate; anterior margin of the nose wavy, 

 emarginate ; labrum extended, sub-orbicular, convex in middle, de- 

 pressed in middle before, sides turned up; antennae, the second, base 



